George l



(Nb Model.)

Patented Nov.' 10, 1896.

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GEORGEA MCKAIN, lTASHIXGTON, PENNSYLVANIA Toot-FISHING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 571,279, dated November 1:0, 189

Application filed Tune 27, 1896. ,Serial No. 597,187. lllo'model.)

and it consists in a tool-carrier provided with i slips adapted to gripwithinv the removable Vin the Well.

casing. y

'The invention consists, further, in the special construction of such carrier and in the S novel constructions 4and combinations of yparts, as will be hereinafter 4more fully described,- andgpointe'd out-in the claims.

` In the drawings, Figure l4 is a'vertical longitudinal section of-my improvement as in use. Fig. 2 is a cress-section of the device on dotted line 2 Zof Figfl, and Fig. 3 is a detail view of one of theslips.' Y

The purpeseof the apparatus is to remove well-tools that-ha\ "e been stucil orlost in oily wells.

` In explaining the invention it'may be well to state that in .drilling some wells 'a thirteeninchhole is started and drilled to a depth of, say, three hundred' and fifty feet, and teninch, casing inserted te such depth. The well is then drilled deeper-sometimes to a farther depth of six hundred feet-before another easing is putin. In some of the fields there is occasionally found a cave at a point from feigh't' hundred to nine hundred feet from the surface. iare once stuck, there is no hope with the ordi- If thisV cave is bad and the tools nary appliances of ever getting them out.'

In carrying out my invention I put a string of eight-inch casing'A into the well inside the three hundred feet of ten-inch casing B and lower the casing Adown past the cave and to a point 'near the top of the `tools that are stuck The carrier is supplied wih a fishing-tool D, which may be of any desired fashion and may be integral with the carrier C or separate therelrmn' and threaded thereto at d, as shown. 4 When hold is secured upon the tools in the Well, the carrier is pulled up into the' inner removable eight-inch casingA and is clamped thereto by the slips presently described. The

rQpe E may then be' cut and the eight-inch casing drawn, bringing the carri-errand tools with it.l The purpose of this construction is to avoid .the damagingfeffect of 'the cave by using the casing to pull the tools with.

.In speciiicallydeseribing the improved device, whielrforI convenience of `reference I term a carrier, it may be said 'to comprise upper and lower sections F and G, jointed at H'by a tenon and'A socket and held at such joint from turning by a key h, such sectional and jointed construction being preferred` for [convenience in applying and removing the slips I; but manifestly I do not desire to be llimited in the'broad features of my invention thereto.

The slips I, preferably two. in number, are

fitted on the carrier and are, adapted toibind` 111 certain adjustments within the casing A,

being to such end se'rlated at lil upon their outer faces, as shown.

In the construction shown the carrieris provided with longitudinal tapering seats J, 'diverging toward their upper ends and pro-A vided wi'th dovei-ail ribs j, fitting in dovetail grooves j in the slips I, the slips heilig movable longitudinally upon they seats J, so they may move upwardl to expand and grip within the casing A' or down 'to playfreely within said casing, as will be readily understood.

Springs I bear beneath the slips I and tend to-force them upward. Then the carrier is being lowered into the casing, the slips are pressed downward and a string is tied ,around them to hold them down. caught, the carrier is drawn upward into the casing A, when by a little jarring, aided by' the springs I', the .string will be broken and the slips allowed to ascend, expanding and binding within 'the eight-inch casing, as will lover end with means for thel connection of a Then the tools are IOO drill-rod grab or socket and provided with the tapering seats snreading toward their upper ends, and the slips held to and sliding along said seals substantially as shown and described.

y as described of the body haring tapering seats,

the slips movable ylongitudinally along said seats, registering sockets being provided inthe end s of the sli p and in the body and springs tit-ting in said sockets and arranged to aetnate the slips "longitudinally, substantizilly as shown and described.

l. The combination of the casing, the tool fitting therein and having at its lower end means for connecting the tool grab or socket and having between its ends tapering seats,

and slips-movable longitudinally thereon and adapted to bind in the casing, whereby the latter may be lifted to withdraw' the said-tool and the parts attached thereto, substantially, as shown and described.

5. The improved tool herein deseri i'ed, consisting of the carrier having upper and lower sections jointed together and held at such joint from turning, the lower section being provided at' its lower end with means for connecting witha drill-rod grab or socket, and the upper section being provided with longitudinally-tapering seats, the slips held to and movable along said seats, the springs by which to actuate said slips and the breakable cord or band encircling said slips and adapted to hold the saine in retracted position, suhstaw tially as shown and described.

GEORGE L. l\il l\`AIN.' Titnessesz Y Gno. C. I'Llnnenovn, J'No. C. DANE. 

